Podhorecka, Marta, Magdalena Cytarska, Dominika Gębka, Radosław Perkowski, Joanna Androsiuk-Perkowska, Alina Jaroch, Emilia Siedlecka–Główczewska, Remigiusz Sokołowski, Walery Zukow, and Kornelia Kędziora-Kornatowska. “Can Physical Activity Influence the Quality of Sleep Among the Elderly?”. Journal of Education, Health and Sport 7, no. 12 (December 28, 2017): 288–305. Accessed July 27, 2024. https://apcz.umk.pl/JEHS/article/view/5177.